Revision+-+Science+&+Technology

__Possible Exam Questions__

 * 1) Science and Technology has helped improve our lives. Discuss.
 * 2) Science and Technology has saved and will continue to save many human lives. Discuss.

__Possible Exam Questions (combined with other topics)__

 * 1) Do you think that in order for Science and Technology to continue advancing, we have to forfeit certain human rights? Explain. (Human Rights & Discrimination)
 * 2) In what ways (e.g. the experiments) do you think make Science and Technology a punishable crime? (Crime & Punishment)

Purpose of Science and Technology
 * __Science and Technology__**
 * Make the world a better place
 * To ease the lives of people (convenience)
 * To keep diseases and sickness at bay

Issues which Science and Technology has had clashed with
 * Human Rights
 * Environment

So does S&T really make the world a better place?

The effects of S&T -Solar Panels -Recycling of plastics -alternative energy resources to oil etcetera - They have helped to develop new drugs / vaccines to help cure deadly diseases which were deadly. -eg vaccine for the malaria crisis cure for smallpox saved millions of lives etc.
 * Pros
 * - They have helped develop means of alternative energy sources to reduce the usage of Earth’s unrenewable resources

- They have made our lives much more convenient - the emergence of handphones and mobiles, the internet - create a platform for simple communication

Technology has also helped mankind manage the serious problem of depleting natural resources. These alternative energy resources do not produce any by-products that pollute the nature. Human has discovered various alternate energy resources such as:

Solar power

-Solar energy is one the most resourceful sources of energy for the future.

-One of the reasons for this is that the total energy we recieve each year from the sun is around 35,000 times the total energy used by man.

-Solar energy is presently being used on a smaller scale in furnaces for homes and to heat up swimming pools. On a larger scale use, solar energy could be used to run cars, power plants, and space ships

-However, the process of turning solar energy into usable energy is very expensive, thus it is not used on wide scale.

Wind power

-The average wind velocity of Earth is around 9 m/sec.

-And the power that could be produced when a wind mill is facing the wind of 10 mi/hr. is around 50 watts.

-Several countries have achieved relatively high levels of wind power penetration, such as 19% of stationary electricity production in Denmark, 11% in Spain and Portugal, and 7% in Germany and the Republic of Ireland in 2008.

-At the end of 2008, worldwide nameplate capacity of wind-powered generators was 121.2 gigawatts.

Hydro power

-Normally manifested as electrical power

-Falling water rotates turbines which rotates to form electrical power

-Hydroelectric power now supplies about 715,000 megawatts or 19% of world electricity

-Hydroelectric power can be far less expensive than electricity generated from fossil fuels or nuclear energy.

-Areas with abundant hydroelectric power attract industry.

PROS: > > > CONS: > > > These alternative resources help humankind preserve our depleting natural resources.
 * Sustainable
 * Well suited to providing power in home or single building applications
 * Available all over the world
 * Well proven technology
 * Non-polluting
 * Tax incentives
 * Low maintenance
 * Can take a large area to produce the energy needed
 * More expensive at the current time
 * Less energy on cloudy days, higher latitudes
 * No energy at night
 * An energy storage device is required
 * Negative aesthetics
 * Cons -
 * Over-dependence, neglect other important aspects in life
 * They have unleashed a whole new lot of new and devastative weapons which aim to destroy and to facilitate oppression
 * They have unleashed a whole new lot of new and devastative weapons which aim to destroy and to facilitate oppression

__**Possible Questions**__